--- ray/src/util/findglare.c	1991/03/21 17:11:46	1.11
+++ ray/src/util/findglare.c	1991/04/10 15:59:07	1.16
@@ -40,11 +40,15 @@ int	hlim;				/* central limit of horizontal */
 
 struct illum	*indirect;		/* array of indirect illuminances */
 
+long	npixinvw;			/* number of pixels in view */
+long	npixmiss;			/* number of pixels missed */
 
+
 main(argc, argv)
 int	argc;
 char	*argv[];
 {
+	int	combine = 1;
 	int	gotview = 0;
 	int	rval, i;
 	char	*err;
@@ -98,6 +102,9 @@ char	*argv[];
 		case 'p':
 			picture = argv[++i];
 			break;
+		case 'c':
+			combine = !combine;
+			break;
 		case 'd':
 		case 'l':
 			rtargv[rtargc++] = argv[i];
@@ -176,6 +183,8 @@ char	*argv[];
 	if (threshold <= FTINY)
 		comp_thresh();			/* compute glare threshold */
 	analyze();				/* analyze view */
+	if (combine)
+		absorb_specks();		/* eliminate tiny sources */
 	cleanup();				/* tidy up */
 						/* print header */
 	printargs(argc, argv, stdout);
@@ -223,6 +232,7 @@ init()				/* initialize global variables */
 	indirect = (struct illum *)calloc(nglardirs, sizeof(struct illum));
 	if (indirect == NULL)
 		memerr("indirect illuminances");
+	npixinvw = npixmiss = 0L;
 	copystruct(&leftview, &ourview);
 	copystruct(&rightview, &ourview);
 	spinvector(leftview.vdir, ourview.vdir, ourview.vup, maxtheta);
@@ -276,6 +286,9 @@ cleanup()				/* close files, wait for children */
 		close_pict();
 	if (octree != NULL)
 		done_rtrace();
+	if (npixinvw < 100*npixmiss)
+		fprintf(stderr, "%s: warning -- missing %ld%% of samples\n",
+				progname, 100L*npixmiss/npixinvw);
 }
 
 
@@ -283,19 +296,32 @@ compdir(vd, x, y)			/* compute direction for x,y */
 FVECT	vd;
 int	x, y;
 {
+	static int	cury = 10000;
+	static double	err, cmpval;
+	long	t;
 	FVECT	org;			/* dummy variable */
 
 	if (x <= -hlim)			/* left region */
 		return(viewray(org, vd, &leftview,
-				(x+hlim)/(2.*sampdens)+.5,
-				y/(2.*sampdens)+.5));
+				(double)(x+hlim)/(2*sampdens)+.5,
+				(double)y/(2*sampdens)+.5));
 	if (x >= hlim)			/* right region */
 		return(viewray(org, vd, &rightview,
-				(x-hlim)/(2.*sampdens)+.5,
-				y/(2.*sampdens)+.5));
-						/* central region */
-	if (viewray(org, vd, &ourview, .5, y/(2.*sampdens)+.5) < 0)
+				(double)(x-hlim)/(2*sampdens)+.5,
+				(double)y/(2*sampdens)+.5));
+					/* central region */
+				/* avoid over-counting of poles */
+	if (cury != y) {
+		err = 0.0;
+		cmpval = sqrt(1.0 - (double)((long)y*y)/((long)vsize*vsize));
+		cury = y;
+	}
+	err += cmpval;
+	if (err <= 0.5)
 		return(-1);
+	err -= 1.0;
+	if (viewray(org, vd, &ourview, .5, (double)y/(2*sampdens)+.5) < 0)
+		return(-1);
 	spinvector(vd, vd, ourview.vup, h_theta(x));
 	return(0);
 }
@@ -328,7 +354,8 @@ printillum()			/* print out indirect illuminances */
 
 	printf("BEGIN indirect illuminance\n");
 	for (i = 0; i < nglardirs; i++)
-		printf("\t%.0f\t%f\n", (180.0/PI)*indirect[i].theta,
-				PI * indirect[i].sum / indirect[i].n);
+		if (indirect[i].n > FTINY)
+			printf("\t%.0f\t%f\n", (180.0/PI)*indirect[i].theta,
+					PI * indirect[i].sum / indirect[i].n);
 	printf("END indirect illuminance\n");
 }